Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS4622797 A
Publication typeGrant
Application numberUS 06/772,658
Publication dateNov 18, 1986
Filing dateSep 4, 1985
Priority dateSep 7, 1984
Fee statusPaid
Also published asDE3577335D1, DE8525506U1, EP0174297A2, EP0174297A3, EP0174297B1
Publication number06772658, 772658, US 4622797 A, US 4622797A, US-A-4622797, US4622797 A, US4622797A
InventorsHeinrich Wuster
Original AssigneeWuester Heinrich
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Double-faced webbed panel unit, which is bordered at its edges by sections which abut at an angle to each other
US 4622797 A
Abstract
A webbed panel unit having two facings bordered at its edges by sections which abut at an angle to each other. Two abutting sections are connected to each other and to the double-faced webbed panel by a two-legged corner angle member, which is disposed in a cutout of the double-faced webbed panel. The legs of the angle member extend in and snugly conform to the ends of the two sections. The two facings of the webbed panel unit have edge portions which protrude into the sections. At least at one end of each section each edge portion is disposed in between the corner angle member and the adjacent inside surface of the section.
Images(2)
Previous page
Next page
Claims(8)
I claim:
1. A double-faced webbed panel unit, which is bordered at its edges by sections which abut at an angle to each other, characterized in that two abutting sections (5, 6) are connected to each other and to the double-faced webbed panel (1) by a two-legged corner angle member (2), which is disposed in a cutout (8) of the double-faced webbed panel (1) and the legs (3, 4) of which extend in and snugly conform to the ends of the two sections (5, 6) and at least at one end of the section each of those edge portions of the two facings (1") of the double-faced webbed panel (1) which protrude into the interior of the section (6) is disposed between that leg (4) of the corner angle member (2) that has been inserted into the end of the section and the adjacent inside surface of the section.
2. A double-faced webbed panel unit according to claim 1, characterized in that one leg (4) of the corner angle member (2) extends in the end of one section (6) between the two facings (1") of the double-faced webbed panel (1) and its other leg (3) extends in that portion of the end of the other section (5) which is free of the double-faced webbed panel (1).
3. A double-faced webbed panel unit according to claim 1, characterized in that both legs of the corner angle member extend in the ends of both sections between the two facings of the double-faced webbed panel.
4. A double-faced webbed panel unit according to claim 1, characterized in that the two facings (1") of the double-faced webbed panel (1) are clamped between the adjacent inside surface of the section and the adjacent leg (4) of the corner angle member (2).
5. A double-faced webbed panel unit according to claim 1, characterized in that at least one leg (4) of the corner angle member (2) is sharpened like a knife for cutting through the webs (1') of the double-faced webbed panel (1).
6. A double-faced webbed panel unit according to claim 1, characterized in that at least one leg (4) of the corner angle member (2) is provided with barblike elevations (7) for fixing the double-faced webbed panels (1) in the adjacent section end.
7. A double-faced webbed panel unit according to claim 1, characterized in that the legs (3) of the corner angle member (2) engage projections (10) protruding from the inside surface of the sections (5).
8. A double-faced webbed panel unit according to claim 7, characterized in that each section is provided on its inside surface with projections (9, 10), which interengage with the adjacent leg (3, 4) of the corner angle member (2).
Description

In greenhouses and hotbeds used in horticulture, the glass panes preferred in the past are increasingly replaced by highly transparent double-faced webbed panels made of plastic. Whereas glass is relatively heavy and breaks easily and have very poor heat insulation properties, double-faced webbed panels distinguish by being extremely light in weight and absolutely resistant to breakage and having extremely favorable heat insulation properties. The double-faced webbed panel comprises two facings, which are spaced apart by longitudinally extending webs so that a multiplicity of air chambers are formed.

Owing to their cellular structure, said panels have inherently an adequate stiffness even in case of small wall thicknesses. But the cellular walls are so flexible that structures covering large areas can be made only from assembled units, which are reinforced by edge sections. Because small wall thicknesses must be used for an economical manufacture and the plastic used for the panels has a high elasticity, the joining of the cellular walls to the required sections is extremely difficult. For this reason, conventional fasteners, such as screws or rivets, cannot be used. A further difficulty is due to the differential thermal expansion of the plate and the reinforcing sections.

Particularly in the manufacture of panel structures which cover large areas and are angled as desired, such as are required for side walls or covered windows of greenhouses and which are required to be bordered on all sides by supporting or covering sections, a reliable joint has not been disclosed before.

It is an object of the invention to provide a double-faced webbed panel unit which is provided at its edges with stiffening sections which are reliably joined to the double-faced webbed panel whereas movements caused by differential thermal expansion are permitted.

This is accomplished in accordance with the invention in that two abutting sections are connected to each other and to the double-faced webbed panel by a two-legged corner angle member, which is disposed in a cut-out of the double-faced webbed panel and the legs of which extend in and snugly conform to the ends of the two sections, and at least at one end of the section each of those edge portions of the two facings of the double-faced webbed panel which protrude into the interior of the section is disposed between that leg of the corner angle member that has been inserted into the end of the section and the adjacent inside surface of the section. That design ensures a joint of optimum strength between the double-faced webbed panel and at least two sections extending at an angle to each other and permits a differential thermal expansion because the double-faced webbed panel is fixed only at points.

The invention will now be explained in more detail with reference to an illustrative embodiment shown on the drawings, in which

FIG. 1 is a transverse sectional view showing a double-faced webbed panel,

FIG. 2 shows a corner of a rectangular double-faced webbed panel unit.

FIG. 3 is a sectional view taken on line A--A in FIG. 2.

FIG. 4 shows the separate parts forming the corner shown in FIG. 2, and

FIG. 5 is a top plan view showing the sharpened forward portion of a leg of the corner angle member.

By way of example, a right-angled corner joint of a rectangular double-faced webbed panel unit is shown. The invention may be applied to any desired angles.

The double-faced webbed panel unit comprises a double-faced webbed panel 1, which at its edges is bordered by sections. At the corners of the double-faced webbed panel unit the sections are joined to each other and to the double-faced webbed panel 1 by means of a corner angle member 2. The corner angle member 2 is preferably mass-produced from plastic at low cost and comprises a leg 3, which conforms to the interior of one bordering section 5 and which is inserted into the bordering section 5 during the assembling. The other leg 4 is also dimensioned to be insertable into the other bordering section 6 but is smaller by the extent of the two facings of the double-faced panel 1. The leg 4 is sharpened like a knife at its end 4 and is provided with barblike elevations 7 throughout its length. During the automatic blanking of the double-faced webbed panels 1 to the desired size, a triangular cutout 8 for accommodating a portion of the corner angle member 2 is cut at each corner.

For assembling, the bordering section 6 which extends at right angles to the longitudinal webs 1' of the double-faced webbed panel 1 is fitted on the double-faced webbed panel 1 first. Then the smooth leg 3 of the corner angle member 2 is inserted into that bordering section 5, which is dimensioned to fit the longitudinal side. Thereafter the knife-shaped end 4' of the corner angle member 4 is inserted into the end opening of the bordering section 6, which has previously been fitted on the double-faced webbed panel 1. When the bordering section 5 associated with the longitudinal side is subsequently forced into position, the corner angle member 2 is forced into the end opening of the bordering section 6 at the same time. In that operation the barblike elevations of the leg 4 force the two facings 1" of the double-faced webbed panel 1 against the inside surfaces of the bordering section 6 whereas the knife-shaped, pointed end 4' during its insertion cuts through the thin cell walls or longitudinal webs 1' extending at right angles. As a result, the two facings 1" are fixed throughout the length of the leg 4 by the barblike elevations of the corner angle member 2 against a displacement in the transverse direction. Projections 9 or noses protruding inwardly from the inside surface of the bordering section 6 prevent a displacement of the facings 1" of the double-faced webbed panel 1 in the longitudinal direction. Said projections 9 prevent also a displacement of the bordering section 5 which is disposed on the longitudinal side because the smooth leg 3 of the angle 2 bears also on projections 10 or noses. When all four corner joints have been forced into position, the double-faced webbed plate 1 has reliably been joined to the bordering sections embracing said panel, without a need for additional means, and the bordering sections have also been fixed in all directions but provide for an adequate play for thermal expansion because the double-faced webbed panel is fixed only at its corners.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2833003 *Nov 22, 1954May 6, 1958Bourne Joseph BStructural panel
US3438164 *Jan 5, 1967Apr 15, 1969Elco KunststoffeUnit construction component
US3834101 *Aug 25, 1972Sep 10, 1974Mesker Ind IncInsulated door construction
AU232030A * Title not available
DE1108407B *Apr 11, 1957Jun 8, 1961Werner Schlegel Dr IngStabfoermiger Hohlkoerper fuer Fenster- oder Tuerrahmenleisten
FR963054A * Title not available
GB1206395A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4899507 *Feb 25, 1988Feb 13, 1990Glaceries De Saint - Roch S.A.Curved glazed panels
US5923002 *Nov 12, 1997Jul 13, 1999Owens Corning Fiberglas Technology, Inc.Acoustical room paneling and method of installation
US6662503Apr 4, 2002Dec 16, 2003Kohler Co.Bathing enclosure wall panel
US20020034612 *Jun 19, 2001Mar 21, 2002Knutson Thomas J.Plastic sideboards for the transportation equipment industry
US20040219853 *Feb 27, 2004Nov 4, 2004Weir Charles R.Room finishing system
US20070068101 *Oct 17, 2006Mar 29, 2007Weir Charles RPanel system for reaction-to-fire test applications
Classifications
U.S. Classification52/783.1, 52/782.1, 52/656.5, 52/793.1, 52/800.12
International ClassificationE04C2/34, E04C2/38
Cooperative ClassificationE04C2/38, E04C2/34
European ClassificationE04C2/38, E04C2/34
Legal Events
DateCodeEventDescription
May 1, 1990FPAYFee payment
Year of fee payment: 4
May 3, 1994FPAYFee payment
Year of fee payment: 8
May 1, 1998FPAYFee payment
Year of fee payment: 12